LTC2636IMS-LMX10#PBF

Overview

The LTC2636IMS-LMX10#PBF is an octal 10-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference with a full-scale output of 2.5V and operates on a single 2.7V to 5.5V supply. The device includes rail-to-rail output buffers, guaranteed monotonicity over the –40°C to 85°C industrial temperature range, and communicates via a 3-wire SPI/MICROWIRE interface with clock rates up to 50MHz. It incorporates a power-on reset circuit that sets outputs to mid-scale in external reference mode upon startup.

Feature Summary

• Octal 10-Bit Resolution: Provides eight independent DAC channels with 10-bit resolution.
• Integrated Precision Reference: Features a 10ppm/°C internal reference setting a 2.5V full-scale output.
• Industrial Temperature Range: Guaranteed monotonic operation from –40°C to +85°C.
• Power-On Reset to Mid-Scale: Outputs initialize to mid-scale when using an external reference.

Applications

• Mobile Communications
• Process Control and Industrial Automation
• Automatic Test Equipment

Procurement Notes

Verify the package type matches the design requirements, as this specific part number utilizes the 16-lead MSOP package. Confirm that the system power supply remains within the 2.7V to 5.5V range for specified performance. Ensure the external reference voltage connected to the REF pin adheres to the absolute maximum ratings during power sequencing.

Selection Notes

Select this component when eight independent analog outputs are required in a compact form factor. The L suffix indicates a 2.5V full-scale range suitable for lower voltage systems compared to the H variant. The MX suffix specifies mid-scale initialization for external reference applications, which may be necessary if downstream circuits cannot tolerate zero-scale outputs during power-up.

Part Context

This part belongs to the LTC2636 family, which offers various resolutions (8-, 10-, and 12-bit) and package options including DFN and MSOP. The IMS designation specifically identifies the industrial temperature grade and MSOP packaging, distinguishing it from commercial or automotive grades within the same functional family.

Replacement Considerations

Direct substitutes include other parts within the LTC2636 series with adjusted suffixes for resolution or reset behavior, such as LTC2636IMS-LMI10#PBF for internal reference mid-scale reset or LTC2636IMS-LZ10#PBF for zero-scale reset. Cross-family replacements like the LTC2637 offer I2C interfaces instead of SPI.